The opposing magnetic intensity that must be applied to a magnetic substance to remove the residual magnetism.

Related Terms

COMPOUND

(1) chemically speaking, a distinct substance formed by the combination of two or more elements in definite proportions by weight and possessing physical and chemical properties different from those of the combining elements. (2) in petroleum processing, generally connotes fatty oils and similar materials foreign to petroleum added to lubricants to impart special properties.

AIR

A substance containing by volume approximately 78 - 79% nitrogen; 20.95% oxygen, 0.94% argon, traces of carbon dioxide, helium, etc.

ARMATURE DEMAGNETIZATION

The reduction in the effective magnetic lines of force, produced by the armature current.

AIR GAP

The space between magnetic poles, or between the rotating and stationary assemblies in a motor or generator.

HALVING

The process of adjusting magnetic compass correctors so as to remove half of the deviation on the opposite cardinal or adjacent intercardinal headings to those on which adjustment was originally made when all deviation was removed. This is done to equalize the error on opposite headings.

HEELING MAGNET

A permanent magnet placed vertically in a tube under the center of a marine magnetic compass, to correct for heeling error.

GRID MAGNETIC ANGLE

Angular difference in direction between grid north and magnetic north. It is measured east or west from grid north. Grid magnetic angle is sometimes called GRID VARIATION or GRIVATION.

ACIDIC

The reaction of a substance with water resulting in an increase in concentration of hydrogen ions in solution (see acid).

FLUID

A substance readily assuming the shape of the container in which it is placed; e.g. oil, gas, water or mixtures of these. A general classification including liquids and gases.

CATALYST

A substance which speeds a chemical action without undergoing a chemical change itself during the process. Now used in catalytic converters to control amount of unburned hydrocarbons and CO in automobile exhaust.

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